OVP Relay

[jpskiller]

Cheers for advice I've got a mate who does electronics, so gonna get him to re-solder OVP relay and see how it goes, will keep people informed..

 

[jpskiller]

I'd have thought it'd be the other way round. Ie, adjust the idle using the screw as low as it goes, then adjust the throttle to whatever engine speed you wanted, then adjust the idle speed back to spec.

I know there's a small screw to adjust the idle, I imagine that there is as way of adjusting how much the throttle closes to as well?

Will

have you got a diagram that points to this SCREW please.

 

[Ian B Walker]

have you got a diagram that points to this SCREW please.

I don't think you have a screw as in the 102 variant (side of the throttle body) Adjustment is done as, Ensure the angled plate closes the micro switch to the cold start valve and then screw in or out the bar that goes to the throttle / actuator. Will post a pic tomorrow of what I mean.

 

[neilrr]

Just had a look and part no is : 201 540 37 45
top is orange with 2 blade 10a fuses.

Sounded familiar. Cosworth OVPs have 2 fuses that part number. If you find you do need one there's one on ebay now with no bids starting at £5.00.

http://cgi.ebay.co.uk/MERCEDES-190E...262227725QQcmdZViewItem?hash=item260262227725

 

[jpskiller]

Small update,

1) Cleaned throttle body
2) Removed e-mag (shortened Petrol pipe - had to extend to fit e-mag)
4) had OVP Replay Re-Soldered

so far so good, but is intermitent and there is no way to force this problem..i'll see how it goes

does anyone think that the OVP Relay I have is wrong for the car, considereing that when I bought it, it did have a 190e Oil filter on which we changed staright away..

 

[kth286]

Small update,

1) Cleaned throttle body
2) Removed e-mag (shortened Petrol pipe - had to extend to fit e-mag)
4) had OVP Replay Re-Soldered

so far so good, but is intermitent and there is no way to force this problem..i'll see how it goes

does anyone think that the OVP Relay I have is wrong for the car, considereing that when I bought it, it did have a 190e Oil filter on which we changed staright away..

You need to put VIN up to see what options you have ie ASD can influence which OVP relay.

 

[jpskiller]

You need to put VIN up to see what options you have ie ASD can influence which OVP relay.

Model300 E
Chassis1240302A836496
Engine103983 22 132272
Transmission722358 03 136373
Order0 8 537 35685
Approx. year1988
DealerGreat Britain
(537) Interiorl eather pebble
(275) Paint172 anthracite grey metallic (с 01.01.1963)
Options
238city drive light for Great Britain (с 01.06.1986 по 31.10.1989)
240outside temperature indicator (с 01.03.1982)
286luggage nets on front seat backrests (с 01.01.1962)
341additional lamp (с 01.09.1982)
362
412electric sliding roof with tilting device (с 01.07.1983)
420automatic transmission, floor shift (с 01.01.1963)
430headrests in the rear (с 01.01.1977)
440tempomat (cruise control) (с 01.09.1975)
461Unknown code
507outside rear view mirror, right and left, heated (electrically adjustable on the left) (r.h.d.) (с 01.10.1983 по 31.03.1989)
524paintcoat preservation (с 01.01.1964)
543sun visor with vanity mirror, illuminated, left and right (с 01.11.1978)
570folding armrest front w202/210 stowage box front with armrest (с 01.04.1970)
front folding armrest w202 - housing at front with armrest
586Behr air conditioner, and electric window lifters (front and rear doors) (с 01.04.1970)
593heat-insulating glass, all-around, heated rear window pane (single-sheet safety glass), band filter
green heat-insulating glass all round, heated rear window, single pane safety glass - tinted strip (с 01.01.1972)
600headlamp wiper/washer (с 01.08.1971)
613lamp unit, asymmetrical, l.h. traffic (с 01.02.1963)
640aluminium disc wheels with radial-ply tires (с 01.10.1969 по 31.12.1989)

 

[jpskiller]

Oh well spoke too soon, must have tempted fate.

started car up this evening and it did the high idle, switched off and tried a couple of mins later did same.

So still something wrong.... but hasent stalled yet (REALLY TEMPTING FATE NOW)

 

[kth286]

jpskiller

Your VIN would indicate you need the 7 pin OVP relay - as my research shows 9 pin is for 4matic cars and cars with ASD limited slip diff - which your car does not have.

201 540 3745 seems to be the part number for OVP relay for your car.

 

[jaymanek]

this is definately either the OVP or Idle Speed Control Valve JPS... these are all the usual symptoms..

 

[jpskiller]

this is definately either the OVP or Idle Speed Control Valve JPS... these are all the usual symptoms..

I've been thinking same myself, car has been running on this OVP relay for last year fine, and now with having it re-soldered should have fixed any glitches, I need to try another ICV Valve when I can get hold of one.

 

[jaymanek]

You need someone with a similar car so you can swap and test, cant you pop over to IBW to se if he has both parts kicking around?

 

[Ian B Walker]

Spoke to Paul today. I have the bits in question and he is more than welcome to try them.

 

[jpskiller]

Little update, nearly 3 weeks since OVP Relay re-soldered and same ICV :

Car has only done the over revving on startup once. Have not been able to get the RPM's to drop below 600, the car now has much better idle and hasent even got near to stalling...so far so good, cheers for advice guys.